The mattress is for a spare room so that is why I didn't purchase a expensive mattress.  This mattress did not expand to a full 6", it is probably 4.5 to 5" now after a week and a half.  The springs from the boxspring can be felt through this mattress.  I am a little disappointed in it as others found this item good and some the same as me.  Truly, I was hoping this to be better than it is.